Highlights
- The South Scottsdale air monitor recorded ozone at 72.0 PPB at 11 p.m. Tuesday, crossing the Unhealthy for Sensitive Groups threshold.
- PM10 at the same station measured 36.0 micrograms per cubic meter during the same hour.
- Maricopa County Air Quality Department is the reporting agency; readers can track current conditions at AirNow's Phoenix-area page.
The South Scottsdale air quality monitor (AQS site ID 040133003) recorded ozone at 72.0 parts per billion at 11 p.m. Tuesday, crossing AirNow's Unhealthy for Sensitive Groups breakpoint for ozone, according to EPA AirNow hourly data reported by the Maricopa County Air Quality Department.
The same station recorded PM10 at 36.0 micrograms per cubic meter during the same hour.
Maricopa County's hot, sunny climate creates conditions that can increase the formation of ground-level ozone, a harmful air pollutant produced when emissions from vehicles and gasoline-powered equipment interact with sunlight, according to the county's air quality department. The department offers email and text alerts when a High Pollution Advisory is issued or when dust pollution levels rise at selected monitoring locations; residents can sign up through the county air quality page.
The Arizona Department of Environmental Quality has separately noted an Ozone High Pollution Watch for the Phoenix area; current forecast conditions are available at ADEQ's Phoenix forecast page.
For current AQI readings and any active alerts across the Phoenix metro, AirNow's Arizona page is updated hourly.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- 040133003 retrieved 23/07/2026 00:17
- Maricopa County retrieved 23/07/2026 00:17
- Maricopa County retrieved 23/07/2026 00:17
- azdeq.gov retrieved 23/07/2026 00:17
Authored by The Scottsdale Signal. Drafted by AI from primary-source material under our beat-specific editorial guides; reviewed by humans before publish under our five-gate process. Sources retrieved at 23/07/2026 00:17. Every claim traces to a source.
